FBI agents are not paid in hourly wages, they are paid through the federal government system GS ratings which provides agents an annual salary rating for years served.
The tariff of the United States, like all actual protective tariffs, is partly revenue and partly protective, its original purpose of yielding revenue having been subordinated to that of giving protection, until it may now be best described as a protective tariff yielding incidental revenue.
A tariff is a tax imposed on the import or export of goods.1 In general parlance, however, it refers to import duties charged at the time goods are imported. Tariffs have three primary functions: to serve as a source of revenue, to protect domestic industries, and to remedy trade distortions (punitive function).